When we install Drupal 8 website from the beginning we set super admin login credentials. But sometimes we get codebase and database dump of an existing website which was set up by someone else.This video explains how you can log in to existing drupal8 website.

By default meta tag, module use node summary/body token to populate meta description of the content type having body field. It does not follow the standard practice of meta description of length between 135 to 150 characters. Even if you set summary length between 135 and 150, your meta description might end with incomplete word and provide a bad search engine preview. You can create a custom token which meets both the criteria i.e 1. The length between 135 and 150 and 2. The last word might be incomplete because of the character limit. You can create a custom token in following way:

Field collection can be used in case a field has subfields. For eg Name can have subfields such as First Name, Middle Name, and Last Name. There might be a requirement of loading field collection items programmatically. It can be done in following way:

There might be a situation when you have to print a block at a specific location on the webpage. In that case, you can load the block and set up a variable which will be printed in twig file. This can be achieved by following way: